With a bra on, wrap a tape measure snugly, but not too tightly, around your rib cage, just below your bust line. This is your band size (US/UK sizing uses inches).

Then, wrap the tape measure around the fullest part of your bust. If the difference is:

1" / 2.5cm your cup size is A

2" / 5cm your cup size is B

3" / 7.5cm your cup size is C

4" / 10cm your cup size is D

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About the Designer

Serena Rees, the co-founder of the iconic lingerie brand Agent Provocateur, launched her new “bed to street” label Les Girls, Les Boys in fall of 2017. The loungewear collection offers classic lingerie (from bras to thongs and boyshorts) in addition to tanks and hoodies with an easy, gender-fluid aesthetic. Les Girls, Les Boys lingerie and casualwear are diverse and accessible, designed to blur boundaries and offer sexy luxury to anyone who desires it.